Fix keyword arguments in dynamic methods in controller specs

Fix FixtureSupport#run_in_transaction?

* Implement check to prevent duplicate job naming

Rename filenames from travis to ci

Fix method name truncation for multibyte strings (redux)

remove all spec views on destroy controller

Prep version 5

Support Rails 6.1

Made a link to 4-0-maintenance branch

Update ammeter dependency to support RSpec 4

Work around ammeter' incompatibility with RSpec 4

See:

- rspec/rspec-core#1821
- rspec/rspec-core#2874
- alexrothenberg/ammeter#64
- example failure (Ammeter::RSpec::Rails::GeneratorExampleGroup that defines destination is not included) https://github.com/rspec/rspec-core/pull/2874/checks?check_run_id=1942170588

Alternative to #2468

Prevent collisions on let(:name) and let(:method_name)

Prevent collisions on let(:name) and let(:method_name)

Snippet is a self-contained example that defines the configuration,
Rails project code and specs to run.

Snippets:
 - allow for clean separation between different snippets
 - work quite fast
 - reuse the already installed gems that specs and Cukes use
 - do not litter
 - do not depend on other parts of the build

In theory snippets retain the ability to use generators and arbitrary
commands, but it makes the case under test less evident.

Co-authored-by: Benoit Tigeot <benoit@hopsandfork.com>

Prevent collisions on let(:name) and let(:method_name)